Carbureter.



a. 1. SCMIFE.

MRIBUWETER.

APPLICATION FILED IULV 6, I914.

Patented M11220, 1915.

fyw WHEN madam.

ARTHUR J. SCAIFE, CLEVELAND, OHIO,

CLEVELAND, OHIO,

assrelvon no arms ma company, or

A CORPORATION OF OHIO.-

caununn'rnu.

v To all rdhom it may concern .which the following is a full, clear, and

lid

exact description. 7

This invention is a carbureter designed especially for supplying to an internal-combustion engine, uniform mixtures of air and gas, especially natural'gas, in contradistinction to such carbureters as porlze gasolene for Irnxture additionally vawith the air.

irrespective of the speed of the engine. 4 The invention consists in the construction and combination of parts shown in the drawing and hereinafter described and definitely pointed out in the appended claims.

In the drawing Figure 1 is a central vertical section of a carbureter embodying the said invention. Fig. 2 is a sectional view in the plane of line 2-2 on Fig. 1'. Fig. 3 is an elevation from the left side of Fig. 1. I Fig; 4n is a bottom plan view; and Fig. 5 is a top plan view of the valve.

Referring to the parts by reference characters, represents a valve casing having a horizontal cylindrical recess in which the cylindrical throttle valve 12 is rotatably mounted. A hole 10 is cut through the lower wall of this valve casing for the admission of air, and another hole 10 is cut through the upper wall of said valve casing and connects the same with the tubular mixing'chamber 13 tegrally with the valve casing, and which is adapted for connection at its ipper end with the inlet manifold of the engine. These two holes are preferably, but not necessarily, cir-.

cular. This tubular mixing chamber is shown surrounded by a water jacket of familiar construction, but this is not at all essential to the invention.

This'valve 12 contains at one end thereof a gas chamber 15, to which gas is admitted through the axially placed tubular stem 16. Gas is discharged from this chamber into the mixing chamber 13 through one or more or all of the jet holes 17 formed through the cylindrical wall of this chamber in such positions that they will be covered by the turning of the valve in one Specification of Letters Patent.

Application filed July 6, 19M. Serial No. 849,126.

' direction; that. is to say, will e construction is such that the mixture produced thereby is substantially uniform,

whose walls are formed in-" progressively un- Patente Apt. ao, iaia.

be progressively brought into communication with the holes 10 in the upper wall of the valve casing. lBy so turning the valve, therefore, the efiective area of the holes through which gas is delivered into the mixing chamber will be increased.

An air hole 18 is formed through valve 12,

in such position that it will be progressively uncovered at both lands by the turning of the valve in the same sively uncovers hole 17 That isto say, the ends of this hole 18 will be brought progressively into communication withthe lower hole 10 and the upper hole 10 in the walls of the valve casing. The hole 18 is of such shapethat as its ends are uncovered, its

eflective' area for the passage of air will increase in proportion to the increased efiective area'of the holes v17 through which the gas escapes from said chamber. Therefore, to whatever extent the valve may be'open'ed, the relative volume of air and gas admitted to the mixing chamber will remain unchanged.

of this stem. This lever may lie between one fixed stop 22 and one adjustable stop 23- direction which progres- At that end of the valve, preferably,

so as to limit its movement between a wholly closed and wholly, open position.

In addition to the hole 18, there is,

through the valve adjacent thereto, a second small hole 25 which is so placed .that when the valve is closed in the sense that the air hole .18 is fully covered, and all of the jet holes 17 are covered, this. "hole remains uncovered at both ends, and in open communication with the holes 10*, 10 in the valve casing. This hole is put so as to make it easier to turn over the engine by hand, when the throttle valve is closed, because through this hole 25 some air may flow when'the engine is being turned over,thereby preventing the formation of any gree' of vacuum in the engine cylinders.

The specific shape and arrangement of the air holes, and the gas outlet holes, as shown in the drawing, be varied as desired, so long as they are such tween the uncovered parts of the air hole are not essential; and may considerable de-,

'whichthe valve shown was made.

and gas discharge holes is substantially preserved.

It will be noted also that the valve, intermediate of the two ends of the air holes 18 and is hollowed out or shell like. That,

. however, is not an essential to the invention,

' thereof.

The invention is shown 1n the drawing in the precise form in which it has been practically successful in using natural gas delivered into the gas chamber through the hollow stem at a pressure of three ounces.

.Having' described my invention, I claim:

1. Ina carbureter, the combina ion of a cylindrical valve casing through the walls of which are two holes, one open to the atmosphere, a mixing chamber with which the other hole communicates, and a cylindrical valve rotatably mounted in said casing, said valve having in one end a gas chamber, through the c lindrical wall of which are discharge ori ces" which will be progressively uncovered and placed in communica- -tion with the mixing chamber as the valve is turned, and said valve having also throughit an air hole which will be progressively juncovered and placed in communication with both holes infthe valve casing by the said turning of the valve, and means for delivering gas into said gas chamber. i

2. In a carbureter,;the combination of a cylindricalvalve casing through the. walls of which are two holes, one open to the atmosphere, a mixing chamber with which the other hole communicates an a cylindrical valve rotatably mounted in said casing, said valve has one end a gas chamber provided with a tubular axially disposed gas inlet stem, there being through the cylindrical wall of said gas chamber discharge orifices which will be progressively uncovered and placed in communication with the mixing chamber as the valve is turned, said valve having also through it an air hole which will be progressively uncovered and placed in communication with both holestin the valve casing by the said turning of the valve.

3. In a carbureter, the combination of a cylindrical valve casing through the wall of which are two holes, one open to the atmosphere, a mixing chamber with which the other. hole communicates, and a cylindrical valve rotatably mounted in said casing, said valve has in one end a gas chamber provided with a tubular axially disposed gas inlet stem, there being through the cylindrical wall of said gas chamber discharge orifices which will be progressively uncovered and placed chamber as the valve is turned, said valve having also through it an air hole which will be progressively uncovered and placed in communication with both holes in casing by the said turning of the valve, and there being also through said valve a small air hole which will remain uncovered at both ends and therefore in communication with both holes through the walls of the valve casing when all of the other holes referredto are covered.

In testimony whereof, I hereunto aflix my signature in the presence of two witnesses.

ARTHUR J. scams. Witnesses: 5

the valve 

